Skandapurana 16.2.83

16.2.83

evamādityasaṃjñaṃ tu tatraiva paripaṭhyate ..
aṣṭādaśabhyastu pṛthakpurāṇaṃ yacca dṛśyate ..
vijānīdhvaṃ dvijaśreṣṭhāstadetebhyo vinirgatam .. 83 ..

Likewise, the [Purāṇa] named Āditya is recited right there. / And whatever Purāṇa is seen separate from the eighteen, / know, O best of the twice-born, that it has come forth from these. (83)